<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
	</head>
	<body>

		<div id="">
			<iframe src="event.html" width="" height=""></iframe>
			<iframe src="" width="" height=""></iframe>
			<iframe src="" width="" height=""></iframe>
			<iframe src="" width="" height=""></iframe>
		</div>
		<div id="">
			<button type="button" onclick="newWindow = window.open('event.html','new_window','',false)">open event.html</button>
			<button type="button" onclick="window.close('new_window');">close</button>
		</div>
		<script type="text/javascript">
			var newWindow = undefined;
		</script>
	</body>
</html>
